Homebrew RF Mixer board for shortwave listening via RTL-SDR.
Did something similar last year but was not successful, the LO and its harmonics trash was all over the spectrum, and had to remove my coax, antenna, and stop all testing later due to construction work at the building. Time to try it again... #SDR #electronics
Not dead yet, still working on the HF Upconverter for shortwave listening. I'll return to retrocomputing and continue working on my Z80 computer again after I managed to get the radio working. #electronics
Found a parasitic oscillation problem at my local oscillator, a lot of RF trash around 70 MHz. #electronics
Generalistic and moderated instance.